The area outside John Lewis was sealed off this morning. There was police tape surrounding a bench, cycle rack and flower bed, with a police officer stationed at the scene, alongside two police cars.

Forensics officers examined the scene and the police seal had been lifted by mid-morning.

Norwich Policing Commander, Superintendent Terry Lordan, said: “Fortunately no one was seriously injured and we have a team of detectives working on this case.

“The area was sealed off while officers carried out scene enquiries and this has now been lifted while the investigation continues. We are keen to hear from anyone who was in the area and may have witnessed the incident.”